How Does Newton's 2nd Law Apply to Stopping Distance?

[tennisacerg]

Can you please help me out with this problem?!?

Suppose that a 1000 kg car is traveling at 25 m/s (about 55 mph). It brakes can apply a force of 5000 N. What is the minimum distance required for the car to stop.

 

[Ja4Coltrane]

acceleration=f/m
that's negative 5m/(ss)
Now the kinematics are easy--but ask if you need help.

Another approach is energy. Work to stop the car=car's kinetic energy=
(.5)(mass)(velocity squared)= (distance)(force by brakes)